s 18
No person shall send by post— (a) any indecent or obscene printing, painting, photograph, lithograph, engraving, book or card, or any other indecent or obscene article; (b) any postal article having thereon, or on the cover thereof, any words, marks or designs of an indecent, obscene, seditious, scurrilous, threatening or grossly offensive character; (c) any postal article bearing any fictitious stamp or purporting to be prepaid with any postage stamp which has previously been used to prepay any other postal article or which has been previously used in payment of any stamp duty; (d) correspondence containing any public lottery ticket or any advertisement of prizes or any other announcement relating to any public lottery, sweepstake or other gambling (e) any other article which the Minister may by rule prohibit. Minister to make rules dealing with prohibited articles